ADVISORY: Cold Snap Ties Record; Snow Coming Wed.

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The National Weather Service issued the following Advisory Monday morning at 6:01am, with the biggest news being that Burien is now Brrrien, last night’s low ties the record (yay team! 20 degrees!), and there’s an 80% chance of snow on Wednesday:

… Snow expected in The Lowlands on Wednesday…
… Cold weather in store for the remainder of the week…

Snow is forecast for The Lowlands of western Washington Wednesday. A developing weather system along the northern British Columbia coast Tuesday will move south over western Washington on Wednesday. This system will draw moist air off the ocean which will override the cold air mass in place over western Washington producing snow. At this point… it is difficult to say how much snow this system will produce. Small changes in the track of the system can effect the amount of snow over the area greatly.

Cold Arctic air will remain over western Washington this week. Daytime highs will have a hard time getting above freezing and nighttime lows could drop into the single digits in some places. Record lows have already been set for today. Previous cold spells this time of year will make the record lows harder to break for the next couple of days.

Since 1990 the low temperature at Seattle-Tacoma Airport has dropped to 15 degrees or less only twice… January 30, 1996 and December 20,1998. Both days the low was 15 degrees. In December 1990 the low temperature at Seattle Tacoma Airport dropped to 15 degrees or less on 5 days.

The record for consecutive days with highs freezing or below at Seattle-Tacoma Airport is 10 set January 21-30, 1969. Here is a list of the top five streaks of high temperatures freezing or below at Seattle Tacoma Airport.

1. 10 days January 21-30, 1969
2. 9 days December 4-12, 1972
3. 7 days January 27 to February 2, 1950
4. 7 days January 12-18, 1950
5. 6 days December 19-24, 1990

In January 1950 the average daily high temperature for the month was 30.7 degrees. This is the only month in the official Seattle weather records that the average daily high temperature was below freezing.

If you have to drive today, be aware that back roads and side streets will be even slicker than yesterday, as what landed and melted has re-frozen even worse; here are a few webcams worth checking out (TIP: Refresh this page to get latest images):

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